i just set it when i connect,set %connect_1 $scon(1) , set %connect_2 $scon(2)
That is exactly what I mean by error-prone.
But more importantly, as 5618 said, you would break scripts.
Since /ab:cd is a valid command, the following could be interpreted in two ways:
on *:TEXT:*:#:15:echo -a hi
/echo -a hi or /15:echo -a hi. Both are valid, and "name:" is a reasonable alias prefix to the point where I'll bet there's at least a few scripts out there using that naming convention. The drawback is possible broken scripts and the gain is purely aesthetic.