Not true. Not true at all. The Apache 2.0 license doesn't prevent a user of Apache-licensed software from suing. It's a defensive patent clause: it deprives the contributor of patent enforcement rights as it relates to a contribution, but allows them to sue a user for patent infringement if they're sued first. If a troll sues a "Contributor" for patent infringement, then the Contributor can sue the troll. So, a troll could use Apache all day long and sue Contributors all day long without a license violation.
3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was submitted. If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed.
Similarly, GPLv3 has a patent license. It affects contributors and distributors, not "users."
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