I absolutely, positively do NOT want government requirements for labeling. If I am concerned with labeling, I will call the manufacturer of the product and ASK. I already do it because I don't consume trans fats (except for naturally occuring ones in beef). The government was "supposed" to regulate trans fat labels, but they haven't. Many items say 0 trans fats but contain a significant amount below 1 gram, and your government allows it to be labeled 0 grams. Nice. That's government at its finest. When I see 0 grams of trans fats, I will call the manufacturer and ask them to confirm the fact that there are zero, and most of the time they'll say "there's a negligible amount" which is the equivalent of saying "yeah, they're in there."
I understand someone calling a manufacturer themselves may give one a sense of self-reliance and individualistic pride, but do you really think that customer service representatives individually responding to millions of incoming enquiries from each consumer would lead to the most accurate dissemination of this sort of information? Knowing most companies, one individual will often get a different answer each time, and the fantasy they may have about suing if they receive inaccurate information certainly won't scare most companies enough to make them devote sufficient resources to responding to individual customer enquiries with the same degree of accuracy as would be required for a label.
And unless a consumer uses an unusually narrow range of produts, they'll be making an awful lot of calls or writing a lot of letters. Twenty, thirty or more on the trans fat issue alone? What happens when product formulations change? Do you have to make fifty phone calls or write thirty letters every three months or so to make sure you have up-to-date information?
That would be extremely inefficient, both for the consumers and companies - far worse than labelling regulations. The only reason companies push for this concept is that they know this concept is a pipe dream - people aren't be so diligent as to make even one call or write one letter, let alone hundreds a year.
If you believe a labelling system is flawed, responding with an absolute opposition to labelling as a concept doesn't make a lot of sense unless you have a government so dysfunctional it makes improvements impossible (in which case, you have much more important issues to devote your efforts to than worrying about trivial amounts of trans fat).