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okay, in that case, better safe than sorry I guess...
Well, look at it this way.
ETF2L hosts a league match on your map. Both teams get to middle and, as BLU's medic is turning to get away from sticky bombs from the RED demoman, he gets stuck on a small protruding wall support and gets blown up.
Stuff like that doesn't give a favorable impression of your mapping skill. You want to make sure that your map in no way impedes the gameplay of the players - only enforces/guides it.