You should definitely boycott Nestle. They are for example aggressively pushing baby milk replacements for newborns in developing countries: more info here:http://www.babymilkaction.org/nestlefree#evidence

"Nestlé promotes its baby milk around the world with the claim such as it is the ‘natural start’, ‘gentle start’ and ‘protects’ babies. In truth, babies fed on formula are more likely to become sick than breastfed babies and, in conditions of poverty, more likely to die. Nestlé has promised to drop the ‘natural start’ claim by mid-2015 following pressure from the campaign, but not the others."

Also, they have been calling for privatization and taking away water as a basic human right, instead wanting to sell people water in bottles.

Here's a list of Nestle products to boycott: http://www.babymilkaction.org/nestle-boycott-list

It contains some surprising ones, like San Pellegrino which is considered to be a high quality water.