David Ignatius [“Snowden knows best?” op-ed, June 13] has joined the critics of Edward Snowden who argue that, because government surveillance programs are legal, Mr. Snowden shouldn’t have revealed them.

Slavery once was legal. The fact that something is legal doesn’t necessarily make it good or right.

Ann White, Washington

I just read another one of those “if you’re not a bad guy, then you have nothing to worry about” letters to the editor when it comes to government surveillance. That’s all well and good if we were governed by angels. The problem occurs when the watchers redefine “bad guys” as people who disagree politically with them. When that happens, it’s already too late to worry.

Fred Niziol, Columbia