Ridiculous, this is tighter than airport security. No re-entry, you must stay in your seat for 3 hours and get no fresh air between periods? Unbelievable to say the least
Based on your post, I feel like you are outraged just for the sake of being outraged.
Re: security, it is definitely not tighter than airport security. You don't take your belt or shoes off. Also, this is a league-wide thing, it's not just the Sens. Ya, it's going to be a pain, but there is no point being upset over a league-wide change when it comes to safety.
Re: re-entry, There were like two places last year to go for a dart (so it's not even fresh air anyway). When I've done it, it ends up being way more of a hassle than it is worth. Might suck in a long playoff game, though, but that is almost a non-concern. I think Smash88 said in the Visiting CTC thread, where this was actually discussed already, it's cool to pick on smokers now. So there will be a fair amount of complaints and head-aches for the ushers. But what can you do.