Strongly disagree. I'm Canadian-Hong Kong, grew up in Hong Kong, and have family in China. Chinese citizens (by which I mean only mainland China, and excluding Hong Kong, Macau, and Taiwan) need exit visas to leave the country and they're not necessarily easy to acquire; anecdotally, those in my extended family who work for the Chinese government are able to get it quite easily (having shown loyalty, willingness to serve, etc.) but those who don't won't get a visa so easily. Consequently we've had vacations where half the family had to cancel at the last minute: even though everyone had the same itinerary and tickets, and were clearly related to each other, some weren't authorised to leave.
I believe it's not a matter of "voting with your feet" so much as "if you don't have a good standing with the government, you aren't getting out in the first place". Anyway, even if you got out and couldn't get back in, the government would probably send people to "escort you back home".
In [the link that GuiA gives below](http://www.slate.fr/grand-format/touristes-chinois-europe-je...), the last slide tells of how the tourists have to surrender their passports; I wonder if the high number of tourists is because going through a tourist agency (all of which are state approved) is the easiest way to get an exit visa. I wouldn't be surprised if the agencies were held accountable for any bad behaviour or runaway attempts.
> À leur arrivée en Europe, les touristes donnent leurs passeports au guide, on leur dit que c'est plus sûr. Ils les récupèrent au moment de partir mais doivent les rendre au guide une fois en Chine pour dix jours à deux semaines afin de vérifier qu'ils sont bien rentrés. Il y a même un code de bonne conduite et les touristes sont encouragés à dénoncer les autres touristes qui se sont mal comportés en Europe.
My translation:
> On their arrival in Europe, the tourists give their passports to the tour guide — they're told it's safer that way. They get them back the moment they leave, but must give them to the guide again for 10–14 days once landed in China so it can be verified that they did indeed return from their trip. There's even a code of good conduct and the tourists are encouraged to denounce other tourists who behaved badly in Europe.
It's also worth noting that China doesn't recognise dual citizenship, and that Hong Kong citizens (not sure about Macau and Taiwan, but I wouldn't be surprised if this applied to them too) are considered mainland citizens once in the mainland. So I, for example, wouldn't be able to appeal to the Canadian embassy if anything happened.
Given that, even if someone stayed abroad long enough to gain a second citizenship, they'd have to give up their Chinese citizenship in order to avoid risking being "escorted home".