Humans make a lot of their choices via the availability heuristic. Being exposed to bad writing can make those trains of thought more available in your mind. I would be wary of it.
When I switched schools I got into an English class with a lot of people who were bad at it. I noticed that I copied some of their mistakes.
This produces interesting results in music: musically talented people who take a mediocre form and turn out something really good from it. c.f. the fans of terrible hardcore punk in the '80s who turned into the grunge scene, Nirvana and cohorts.
Granted, writing is not very effective. But some of us just love writing...
Earning to Give Writing: Which are the places that pay 1USD or more dollars per word?
Mind Changing Writing: What books need being written that can actually help people effectively change the world?
Clarification Writing: What needs being written because it is only through writing that these ideas will emerge in the first place?
Writing About Efficacy: Maybe nothing else needs to be written on this.
What should we be writing about if we have already been, for very long, training the craft? What has not yet been written, what is the new thing?
The world surely won't save itself through writing, but it surely won't write itself either.