Do you mean adding RBLs in general? Spamassasssin does have that check as you've already said and I'm not a big fan of them and have never used them so, my answer would be.... no.
There are many users that swear by them so I guess it's a case of YMMV.
I guess you do things like reject_unlisted_recipients and some of the other techniques in the wiki on
Improving Anti-Spam System?