Interesting that this particular article is brought back now. A few weeks ago, Brazilian press was in an uproar due to the so-called “clube do carimbo” (lit: “rubber-stamp club”), a subculture within the gay community that claims to be doing exactly that: deliberately contaminating sexual partners (by sabotaging condoms etc.)
Check, for instance, this article from a top Brazilian newspaper:
Or you can just google for “clube do carimbo” and see the general repercussion.