Can mods decrease rating?

Is it possible for mods to decrease ratings of players?

If so can some mod make my antichess rating 1600...

Don't ask why :)

They can, but won't.

That is so cool! That means that they can make their rating 3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000!!!!!!!!!!!!!!!!!!!!!!

They can, but won't.

They might.@jaakkoT

They can, but won't.

If they could they wouldn't.