Lots of spam have accumulated on the forum, is it possible to block out that user and delete those?

I have deleted the spam. Sorry for the trouble.

There is even more now. Maybe delete the account as well.

Thanks Bas.

It seems the spams have again accumulated!

If anything can be done with change of security/login guidelines , i think we can all follow that to reduce this .

I don't think people in community would mind taking some extra steps to reduce spam.I am sure you would've already thought about this.