The forums or your internet browser (or something
) will "wrap" sigs, so that if they don't fit on your screen side by side, they will be pushed down so that they're one over another.
If you have sigs in a table like that and they're big or too many in a row, you could end up having to scroll left and right to see everything because tables don't wrap. That wouldn't bother me so much if it only affects the one person, but if it does that for everyone (who have has turned on), if they also have to scroll over because your tabled sigs stretch out the screen, it would have to be changed.