You can mark it as spam and it will be hidden.
When I tried "flag as spam" on a couple of tickets (don't know how I
missed that before, sorry), I get this error:
db_query: SQL query error
You have an error in your SQL syntax; check the manual that corresponds
to your MySQL server version for the right syntax to use near 'WHERE
bug_id='105523'' at line 1 in [UPDATE `support` SET
`spamscore`=8,`summary`='[SPAM] Wooden Hot Tubs',`discussion_lock`=1
WHERE WHERE bug_id='105523']
Sadly, I don't have the wherewithal to debug that right now, so all I
can do is report it. Sorry.
