Given that capitalist international penetration has already happened, and is already a reality (and pretty much always has been, 'globalisation' is a stupid term considering capital has been transnational right from the outset), 'opposing it' would always be stupid. Indeed, I think HS' suggestion, that we propose ways in which the economic sphere might be democratised etc. (hence why we should propose alternatives to international institutions, not just their abolition) is the right thing to do. In power we ought not to be extolling the virtues or necessity of capitalist global expansion (which has often been the gateway to revisionism in any case) but attempting to harness and transform it.
EDIT: also, let's not go nuts over this, because one of Marx's really silly mistakes was thinking that capitalism naturally 'diffused' out, spreading capitalist social relations with it. In practice, imperialism, whilst bringing exploitation to some parts of the world, has consistently kept them in backwards, semi-feudal states, and hasn't particularly encouraged the 'development of the productive forces'. It's rather telling that the 'progress' brought by international capital has either been through foreign, state-led investment so as to build up strategic partners, or has been through national state-led capitalism, which hasn't been overly reliant on global trade etc.
ANOTHER EDIT: incidentally, see this
thread for us dealing with this issue before. Disturbing how little the passage of times has changed our position on this.