Good point, however I've seen many over the years with selective memory when I've pointed out the t&c's at the signing of the documents.
In other cases I've had many accounts that read the entire t&c's and questioned most of the pitfalls.
its those terms that are ambiguous that get clients going, such as "we may raise the service rate on an annual basis". Very opened ended, no cap on increase, in 99% of the time, there is an annual increase