one open top did turn over last week by magor on m4 ,the van stayed upright,dont know if anyone was hurt,i dont think it would be wise myself to tow with open top.
------------- its easy enough to be pleasant when the world rolls along like a song.but a man is worth while if he can smile when every thing goes f------ wrong.
remo, one more thing to check out if the open top car is approved for towing is to google some reviews on "scuttle" shake and choose a model which does not exhibit it. Even some prestige models get the shakes especially under load due to lower stiffness of the car body. It's horrible when it happens. Something to avoid. Like most things some designs show it more than others. Even my old Fiat X19 did it at times (not towing with it though!) Towing with an open top sounds like a very pleasant thing to do .Go for it!Hope this helps.
------------- cramming for my finals in the twilight zone
If its type approved for towing I don't see a problem. They don't just cut the top off like a boiled egg to make a convertible. The chassis is stiffened and the car is often heavier that the tin top.