found the below when i did an "obstruction" search... i emboldened the relevant entries:
In football, what is in the rules to stop 10 players forming a tight, arm-linked ring around their 11th player who then dribbles the ball inside this ring (thus preventing him from being tackled) all the way to the other end and kicks the ball in the opposition goal?
Paul, The Hague, Netherlands
Probably only the likelihood that they would find eleven men forming a tight, arm-linked wall between them and the goal.
Daniel Owen, London, UK
Either some sort of rule against obstruction or the fact that the other team might then just form a line of 10 men and not let the circle pass. Also if it were to be done it would make football even more boring than it already is...
Jonas,
Don't have the exact rule to hand, but sure there is something about the rule of obstruction that would make this particular move unlawful.
Ross N, Clydebank, Scotland
Either obstruction or ungentlemanly conduct, and possibly a few others.
Philip Harris, East Kilbride, Lanarkshire
The Obstruction rule. As soon as you physically impede a player, while not playing the ball yourself, it's a foul.
Gareth Graham, Bristol UK
Alternatively, the opposition players could simply all enter the 'ringers' half. As soon as the ring of players enters the opposition half, the players advance of the ball would be in an offside position, and, although not touching the ball, would be interfering with play (although that's another debate entirely). Free kick to the opposition.
Paul O'Reilly, Helsby, UK
A serial, 'The Q Team' in a boy's comic of the '40s was based on this idea. A group of prisoners of war had developed this technique.
Alan Myers, Hitchin, UK
Law 12 of the Laws of Football states: 'An indirect free kick is also awarded to the opposing team if a player, in the opinion of the referee: impedes the progress of an opponent.
The indirect free kick is taken from where the offence occurred. By preventing the opponent making a legitimate tackle on the player with the ball, a player would be guilty of obstruction.'
Kenny, London, UK
Yes, obstruction, a law which modern referees blithely seem to ignore when a defender "protects" the ball when it is destined to go out for a goal-kick ( i.e. by obstructing an opponent from getting to the ball ).
John Rutherford, Crieff UK
Regarding previous answers, such an action could not possibly constitute obstruction. To be obstructed a player must already be in possession, otherwise it is no offence to shield the ball with your body, as defenders often do when a ball is running into touch.
Jeff Lewis, Exmouth, Devon, UK
The offside rule. The defending team could advance, and the foremost members of the attacking ring would be rendered offside as the player with ball dribbled goalward.
Robert Vagg, Bonn Germany
To John Rutherford: In the case you mention, referees do not 'blithely ignore' anything! A defender who has the ball within playing distance is allowed to shield the ball in the way you describe, but does not have to play it. To Jeff Lewis: it is not only the player in possession who can be impeded. Hence we do not have American Football-style 'blocking' in our game. The answer to the original question is therefore that those in the ring are impeding their opponents. Indirect free kick. By the way "obstruction" no longer exists in the Laws (they are not "Rules"); we talk about "Impeding". And neither does "Ungentlemanly conduct" exist; this has been replaced by "Unsporting Behaviour".
John Branston, Bath Somerset
http://www.guardian.co.uk/notesandqueries/query/0,,-185787,00.html