Pretty much all you can do is never accept presents from others atm, it sucks :/ There is no way to remove them once you receive them so you gotta be super careful with visitors and trading.
I'm kind of pessimistic about Nintendo patching this in a timely manner. I suspect they'll care enough to patch it out considering they patched star fragment trees and multiple dupe glitches, but in every case it took them quite awhile to do so. It might come with the next major update, but I have no clue when that is.
The same could be said for a select few people who feel entitled to high turnip prices, scammers, etc. With any large community, you're always going to have a few bad apples.