Yes, the only problem is that Wappalyzer has a 10-30 days cache so you have to test it with other detectors first.

Make sure that you test it with http://wpthemedetector.com and http://whatwpthemeisthat.com/

Some plugins can’t be completely hidden because they add some classes in the source code in order to work and if we remove them the site will not work anymore.

Even if some detectors detect the plugins, the paths to the plugins are changed and the hacker bots will not be able to inject script in those plugins.