Yes.
See the replay under the the Unsportsmanlike Conduct header in the Upon Further Review. Week 1. thread.
Celebrations such as the Lambeau Leap will not be penalized. Are they spontaneous? Nope. Does it conform with what the league considers as a benign celebration? Yep.
Is that fair? Nope.
Will the league continue to penalized scripted celebrations such as Owens' Bolt/Olympics challenge? Yep.
The complaints will not end in the foreseeable future about certain players drawing fouls and others players not drawing fouls.
Until the rules change, that's the way it's going to be.
Will complaints motivate the league to alter the rules? Perhaps, but it's more likely that a civil discussion between owners and the league or a coalition of the owners and players addressing the league would change the rules. Maybe a fan boycott would do the trick? I doubt fans would organize to hurt the sport we love so much over something so trivial. The rules are in place and the penalty will be enforced, so what should be expected?
A flag.
If an opponent doesn't score because they received great field position due to a unsportsmanlike conduct foul AND it doesn't affect the final outcome of the game, it's really all no harm no foul (pun intended). However, if the penalty helped an opponent score and that score influenced the outcome in their favor, it's kinda pathetic because this particular unsportsmanlike conduct penalty is completely voluntary AND is understood by all parties involved.
Any player getting hit by this particular penalty may not like it. The team may not like it. The fans may not like it. Etc., etc. Knowing all this, should anyone intentionally draw the penalty on purpose? That's my question.