style guides exist for a reason.  obviously a should not can be ignored.  I have times where my line goes over 80 characters, and the times that I do that are like this line.  If it means splitting a url across 2 lines i, personally, find that silly.  Otherwise, i do think its a good idea to follow the 80char line length.  Its not like their line length is a non-standard.  80 chars is fairly common.