You're lazy and looking for a way to justify taking shortcuts the rest of us didn't. Like mentioned previously - your name will be made mud if you ever actually make it into a paid position.
However in reality that doesn't happen. You rock up at the twin operator with your 100+ hours of free/paid twin time and the twin operators says, "oh great someone who meets my minimum experience levels" You're hired. After a year there you have a job in a regional or doing mining charter in a twin turboprop. Next thing you know you're flying a jet. Meanwhile all your mates are still fighting over who does a ferry in the Baron to get some twin time.
End of the day noone cares how you got your experience as long as it isn't fake whether you got paid or not is irrelevant. That's just the reality of the situation. Aviation isn't a "good bloke" competition or who took the moral high ground it's all about who has the experience.
Further to all this would you blacklist AMES/LAMES/IT Professionals/Accountants/Lawyers/Plumbers/Carpenters who have offered their services for free just to get flying jobs? Are they scabs as well? How would the local accountant feel that he lost a client because some pilot/accountant did the accounts for free so that he can fly?