OOO! This reminds me, though I'm sure others have done this too! Too simple not to. But in any event, in lieu of "xoxo", in situations where this would be appropriate I have been known to substitute the subtly different
xxx...
...ooo
xxx...
...ooo
Comments
Because that would look to the person reading like they're getting weird spam from some guy called Ox.
OX! OX! OX!