I also agree that you should speak out. Remember a while back at JNB there was an F406 that crashed on dep off 21L. Now although they could not cfm whether the acft was overloaded we unfortunatly have 3 dead pilots.(sympathy to those that did deal with them)
If you are flying SA reg acft I sugest then that if yur moaning to the company doesn't work try filling out a Confidential hazard Report to the SACAA. Although they do ask for your ctc details these are kept aside from the report when they look into it and are mearly used so that they can give you feedback.
Forms avbl in the SA AIP GEN section or on the caa web site
www.caa.co.za
and click on the CAHRS on the right
And they do look into all the reports they recieve.
This is great for SA but the problem is what the other contries are doing to try stop this (Sweet nothing in most cases unless it involves taking a bribe here or there)
I do think that if you are unhappy then you shouldn't fly but also see the otherside that if you don't do this flight then where is your pay cheque comming from.
Just hope that you can find an honest operater to work for.
good luck to all you low hrs pilots