I don't get your problem. When you say thank you in real life can you 'delete' it? Nobody preserves you from to regret things in life....and here it's 'just' a forum. To delete is rather artificial and to press it by accident....I don't buy off that from you. But it's up to you. Btw: The old system has had the ability to delete thanks, but the counters remained unaffected until I ran update counters.