If you think one rules lawyer is bad, imagine this if you can. A table of 6 PC's and 2 GM's... of which 6 are practicing criminal attorneys, one is a sitting criminal court judge, and the other is an electrical engineer. EVERY comma has a meaning... every prior edition and errata carry weight as "legislative intent". Blog posts are printed off and brought to table as "persuasive authority" but only FAQ and Dev's posts count as "binding authority". Unfortunately, sometimes players have been known to slip back into the mindset of the "adversarial system" where if something is missed that goes against the GM, it was the GM's fault for not catching it (although incorrect rulings against the players are always ret-conned to the correct result). There are usually 5-6 laptops or Ipads at the table w/ the SRD or electronic copies of the rule books always open. Flow charts of the grapple rules are laminated for quick reference.
And yet for all of this, we still take one full Friday off a month to game all day (9 am to midnight)... and have for the better part of 6 years. So the moral of the story is that "rules lawyers" aren't inherently evil. But anything the distracts from the fun of the game should be avoided at all costs. So really, it just depends on your table.
