There are (with varying degrees of shadiness) cracking services which specifically cater to people who have legally purchased software but are hampered by the DRM. Dongles are a bit of an interesting case in that a lot of the time the software they protect is something like the control program for a 6-,7-,or 8-figure priced piece of industrial machinery, without which the software would be useless anyway, so the hardware is already effectively a dongle.