[kh99]

The "delete posts as spam" is done in inlinemod.php. I think you could use hook inlinemod_start and check for $_POST['do'] == 'dodeletespam' and look at $_POST['reason'].

For the admincp/modcp it's done in modcp/banning.php, but there aren't any hooks there. But I guess you could use admin_global and mod_global, and look for $_POST['do'] == 'dobanuser' (it doesn't look like any other script use that value of 'do').