I guess the risk is exactly the same as rulenames colliding.. better notuse very generic names and you can always prepend the rulename yourself. :-)
My other concern is thta as far as I know, SA rules are still limited to a single line of text. If the rule name plus item name gets long, the rule text using rule_name:item_name starts to become very long and unreadable, espcially when multiple items are used in a single rule body.
Loren
