I think they call these build ups Clunkers.
We call them "Icebergs" up North.
This is a real, no kidding problem. Sewage systems are not designed to deal with these non-biodegradable wipes. They get into low spots and areas of slow flow, and just accumulate. It is a really nasty problem.
I am not, generally speaking, in favor of government intervention in the market, but some thing has to be done. People think these things are flushable just like toilet paper is flushable. They are not. They flush down the toilet well enough, but the system you are flushing them into is not designed to handle them.
And don't get me started about what they do to rural septic tanks...