The faucet does have set limits. Agreed it should be limited by the Memo app, not the BCH network.
One other idea occurs: An "unfunded posting page" where new accounts could test-submit what they propose to post "We" could sponsor such posts that have merit, paying the tx fee.
It would require a new page or sub-section under 'feed'? where unfunded posts could be triggered by sufficient tips - which then pays the tx fee. make sure OP gets subsequent tips.
In this ephemeral fashion objectionable material may fail "the sponsor test". After some timespan (24hr?) unsponsored material would simply vanish. (This is only for the unfunded).