This will probably impact other things, such as the signature and this animation, which most campaigns currently have.
Signatures are not affected, they are shown normally with all their movement, like for example in ThorMixer signature.
Only important thing I noticed wont be available is collapse/expand bar on the top right corner, but that is a small price for ''fixed'' news ticker racing track.
You can always disable and enable script with a click of a button.
For me, so far I have not seen or noticed any issue of any sort with the forum or any part of it, I've tested the pause and play button for the news bar and it works really well, only two things I noticed which I wish can be adjusted by admin..
1. I think the speed at which the information in the news bar is running is too fast, admin can perhaps slow it down a bit.
2. When one click the pause button while the news is in the middle of the race, possibly to read up something, when you click the play button again, the news information will go back and start from the beginning - if it's pause and play, the news information should be able to continue running from where it was paused, not return and start from the beginning - this is Stop and play.