Does it tell you who mentioned you and in which thread?
It doesn't IIRC. It pops a number in the top of the page buttons, very similar with a received PM. Than you click and tells you who mentioned you, or something.
What's ugly about mentioning is that last time I've checked, the notifications for being mentioned can not be disabled from the user settings profile. So either handcraft your own blocking filters in uBlock or alike addblockers, or you'll have to endure them.
Seriously though: I have never observed complaints about a missing "thank you", and I find that mechanism helpful.
I'll send you an example by PM.
The 'Say Thanks' button is helpful indeed. Though, it all become awkward for the OP when people start demanding or expecting to be thanked. The problem is it will be many answers, some answers will be more useful, but all the contributors took their time trying to help. By thanking each reply it makes the thanks button meaningless. By not thanking to everybody, it will create some stigma, some might get discouraged, thinking their post was not appreciated.
Another thing, the 'Say Thanks' is used differently by different people, or by context. Can mean:
- Thank you for your help, or
- That's exactly what I wanted to write
- That was the post that solved my problem
- I share the same opinion/I'm with you
- Interesting info, didn't know that
- Thank you for a valuable attachment or link
- That was funny/good joke/I laughed
- Encouragement for a project
etc. With rare exceptions, I'm using the 'say thank' button when a post tells something relevant I didn't know before, or when the post made me think about some unrelated connection that generates a new idea, or answers a question I might have had in my backlog.
Anyway, nobody asked to remove the 'Say Thanks'.
Only saying sending unblockable notifications is bad. It is no different than spam.
Too low effort and too impersonal to mention someone, too high effort to answer to a notification. This place is for volunteer posting, not for summoning requests for an answer from a specific user. If you must have that specific answer, then kindly ask by PM if the user would like to join to the topic where you were coming from.
Regardless of my opinion, not rhetorical questions:
Why do you want/need to mention somebody? What reaction do you expect, or what should the mentioned do about a notification? You want to mention users because your dopamine spiked when you saw you were mentioned? Or do you want the extra power to summon others' attention to your posts? Or is it because you want an authoritative answer? Or is it just the habit to have this feature here, too, just like in other social media networks? Or maybe is it some other use I miss entirely about sending notifications?