User blog comment:DaNASCAT/Technical Update: August 22, 2016/@comment-452-20160824225437/@comment-26402117-20160825164614

Thanking the anonymous user should be conditional on them not being blocked. Would allowing people who are editors (by an editcount and activity requirement) to thank people be a good idea? There's also the option of restricting appreciation to edits that have been patrolled by a sysop or content mod.