hey mate, as much as I appreciate what you are trying to do:

https://steemit.com/steemdev/@almost-digital/creating-accounts-with-dsteem-0-6#@mukhtar.juned/re-almost-digital-2017830t8047599z

is a spam follow-for-follow comment. I checked and the user copy pasted it several times, after you liked it, so effectively you seem to have encouraged him to spam...

Not sure how you could prevent that, since I dont understand how you even judge the comments or is it just random?