WordPress will remove the download from it's repository. Typical issues can be coding that results in vulnerability and can also be related to other issues as outlined in WordPress Plugin Guidelines.. But it's safer than downloading plugin that is not available through WordPress depository.. Nevertheless, popularity along with other factors can contribute to assurance that that the plugin is safe and works well.. Installing plugin that has not been updated could cause conflicts with the version of WordPress or the version of PHP that your website runs in.. Every plugin page in WordPress Plugin Repository has support page. The support page may provide evidence if plugin that has ongoing issues. Sometimes WordPress template may need changes order for the plugin to function.. There are other factors that can be added the reputation of the company behind the plugin, if the plugin is over-engineered and slows down the site and so on.. Are you making educated guess or just guessing These are what I consider important factors for judging if WordPress plugin is trustworthy and will help take some of the guesswork out of choosing WordPress plugin..
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