Today has been roto-rooty day. I maintain my 120 year old sewer 2-4 times a year. It's not in great shape, but if I pay attention to roots, it's not bad.
But - I have guests. I pulled 12 'napkins' from it last year. I think it was a younger daughter of a guest. Today I have a plug so tight I can't get it with my 1/2" Ryobi router - even with my custom SawZall bit I fashion for roots - but I did pull back a fragment of "flushable" wipe.
Flushable as are toy soldiers.
Stop! Don't flush 'em.