Security of Elgg

Hi everyone, new member here. I just found Elgg recently and so far I like what I see. Just curious about the security when dealing with spammers and bots etc for the platform. Is this hardwired in or do we have to create our own plugins to deal with registration spam, comment spam and bots? One thing I noticed is when I do a search for version 6.3+ there doesn't seem to be much of anything available in the plugins that I can see. Thanks for your time.