For the most part (98%) Nebraska fans were welcomed and wished a enjoyable time, yep there is that 2% and they are in/around every stadium.
As far as the SWAT goes, actually that was a mild/reserved presentation. You should have seen the Notre Dame game where there was a threat, Heavily armed swat, 3 helo's at all times and snipers on the roof tops.
Bags have not been allowed in the stadium since 9/11.
I will issue a word of warning to Husker fans about traveling to certain B1G venues, BE CAREFUL! I have encountered the threat of violence at Michigan State, Wisconsin, Purdue and that place to the south. Seen vandalism of visiting team vehicles and of course the complimentary bags/cups of urine thrown.
Husker fans, those of you that visited were great people supporting your team, I applaud you. Lets hope we have some great games in the future.