I didn't, but felt like it.
In the library, the person next to me on the PC was snorting/sniffing really loudly every minute.
I had no earphones else I'd have put them in.
I have misophonia which doesn't help but regardless I think it's a disgusting thing to do and adults should know better. It's really not hard to blow your nose.
See this a lot actually from adults, does it bother anyone else?