I do the same and usually get away with it ... once or twice I haven't but such is life ... t'was my own fault. With braid or if its a worry a 4 inch piece of dowel is handy. It fits in a fishing bag no problem and you can wind line or braid round it half a dozen times to take the strain off the reel.True. I normally trap the line against the rod and hopefully take most of the pressure on there, although I suppose it’s not foolproof
With a fixed spool its important to have the spool as far back towards the reel body as it will go before you put any strain on (same goes for casting). If the spool is fully forward you can easily bend or twist the oscillation shaft as it is very vulnerable when fully extended.