I would say that this is not a straight up tactic. I agree with s38 that changing blitzers angles because its drawn up poorly is fine. Manually stacking guys to exploit a gap seems cheezy to me. Like I said in a different thread, there was stuff that we needed to discuss about this game when we started. If tourney style tactics or cheese are allowed then that's fine, but then we need to come out and so and have everyone agree on what is and its allowed.
Personally, I think wr should have votes on every major issue and let the majority decide.